My city sells dated and timed permits for "professional" (sic) photographers to shoot at city-owned parks and properties. The permits are also specific about location within public spaces, which limits the likelihood of this sort of scene.

My city does the same, and for movie/TV/commercial advertizement shoots it can shut down entire city blocks for days. The production companies even hire off-duty cops and/or thugs to protect their turf... most of which is being occupied but not utilized 70% of the time.